利用者:CondeMatte712

出典: くみこみックス

An abdominal aortic aneurysm, usually called AAA or triple A, is actually a bulging, damaged location in the wall structure of the aorta (the largest artery in the body) ensuing in an uncommon increasing or even ballooning greater than Fifty percentage of the typical dimension (width). The aorta extends upward from the top of the left ventricle of the heart in the chest region (ascending thoracic aorta), and then curves just like a candy cane (aortic arch) downward via the chest section (climbing down thoracic aorta) within the abdomen (abdominal aorta). The aorta delivers oxygen rich blood moved from the heart to the rest of the body.

The most usual position of arterial aneurysm development is the abdominal aorta, especially, the section of the abdominal aorta below the filtering system. An abdominal aneurysm centrally located below the kidneys is called an infrarenal aneurysm. An aneurysm can certainly be classified by way of its location, form, and also reason. The figure of an aneurysm is identified as being fusiform or even saccular which usually helps to identify a valid aneurysm. The more common fusiform shaped aneurysm bulges or balloons out on all sides of the aorta. A saccular shaped aneurysm bulges or balloons out only on one side. A pseudoaneurysm, or fake aneurysm, is an enlargement of only the external layer of the blood vessel wall. A false aneurysm may possibly be the result of a prior surgical procedures or injury. From time to time, a split can easily happen upon the interior membrane of the vessel causing in blood filling in between the layers of the blood vessel wall making a pseudoaneurysm. The aorta is under steady tension as blood is ejected from the heart. With each heart beat, the walls of the aorta distend (broaden) and after that recoil (spring back again), applying regular tension or pressure on the already vulnerable aneurysm wall. For that reason, there is a potential for rupture (bursting) or dissection (split up of the layers of the aortic wall) of the aorta, which may trigger life-threatening hemorrhage (out of control bleeding) as well as, potentially, loss of life. The bigger the aneurysm gets, the greater the danger of crack.

Due to the fact an aneurysm may continue to increase in sizing, along with progressive weakening of the artery walls, operative assistance might be needed. Avoiding crack of an aneurysm is 1 of the ambitions of therapy.

Just what leads to an abdominal aortic aneurysm to form? An abdominal aortic aneurysm could be triggered by a number of variables that outcome in the breaking down of the well-organized constitutionnel substances (protein) of the aortic wall membrane that provide support and strengthen the wall surface. The actual trigger is not absolutely identified. Vascular disease (a build-up of plaque, which is a deposit of fatty substances, cholesterol, cellular waste products, calcium, and fibrin in the inner lining of an artery) is thought to play an important factor in aneurysmal condition, including the danger factors associated with atherosclerosis, such as: - age (greater than 60) - male (prevalence in males is four to 5 occasions higher compared to that of girls) - family historical past (first level family members such as dad or brother) - genetic factors - hyperlipidemia (elevated fats in the blood) - hypertension (high blood pressure) - smoking - diabetes

Alternative conditions that might cause an abdominal aneurysm involve: - genetic disorders of connective tissue (abnormalities that can affect tissues such as bones, cartilage, heart, and blood vessels), such as Marfan syndrome, Ehlers-Danlos syndrome, Turner's syndrome, and polycystic kidney disease - congenital (present at birth) syndromes, such as bicuspid aortic valve or coarctation of the aorta - giant cell arteritis - a disease that causes inflammation of the temporal arteries and other arteries in the head and neck, causing the arteries to narrow, reducing blood flow in the affected areas; may cause persistent headaches and vision loss - trauma - infectious aortitis (infections of the aorta) due to infections such as syphilis, salmonella, or staphylococcus. These infectious conditions are rare.

What are the actual signals of abdominal aortic aneurysms? Abdominal aortic aneurysms could become asymptomatic (without signs or symptoms) or symptomatic (with signs and symptoms). Pertaining to 3 of every four abdominal aortic aneurysms are asymptomatic and might be found upon scheduled physical test by the discovery of a pulsating mass in the abdomen. An aneurysm may also be found through x-ray, computed tomography scan (CT scan), or magnetic resonance imaging (MRI) that is being done for other conditions. Because abdominal aneurysm could be existing without symptoms, it is known to as the "silent killer"? simply because it might possibly crack ahead of being determined. Pain is the most widespread indicator of an abdominal aortic aneurysm. The pain related with an abdominal aortic aneurysm might be situated in the abdomen, chest, lower back, or groin area. The pain might be intense or dreary. The occurrence of suffering is typically connected with the imminent (about to occur) crack of the aneurysm. Acute, unexpected onset of severe pain in the back and/or abdomen could represent rupture and is a life harmful healthcare emergency. The symptoms of an abdominal aortic aneurysm could resemble other healthcare disorders or problems. Constantly consult your doctor for more info.

How are aneurysms identified? In addition to a complete health-related historical past and also actual physical check-up, diagnostic procedures for an aneurysm could include any, or a combination, of the following: - computed tomography scan (Also called a CT or CAT scan.) - a analysis imaging procedure that uses a combo of x-rays as well as computer system technologies to produce cross-sectional pictures (often called pieces), both horizontally and vertically, of the human body. A CT scan displays complete pictures of any element of the body, including the our bones, muscles, fat, and organs. CT scans are more detailed than typical x-rays. - magnetic resonance imaging (MRI) - a analytical process that utilizes a combo of big magnets, radiofrequencies, and a pc to produce comprehensive pictures of organs and components within the body. - ultrasound - uses high-frequency sound waves and a computer to create images of blood vessels, tissue, and body organs. Ultrasounds are used to look at internal organs as they perform, and to examine blood flow through various vessels. - arteriogram (angiogram) - an x-ray photo of the blood vessels used to appraise numerous disorders, such as aneurysm, stenosis (narrowing of the blood vessel), or blockages. A absorb dyes (contrast) will be inserted through a thin flexible tube placed in an artery. This dye makes the blood vessels observable on x-ray.

Cure intended for abdominal aortic aneurysms:

Special therapy will be determined by your doctor based on: - your age, overall health, and medical history - extent of the disease - your signs and symptoms - your tolerance of specific medications, procedures, or therapies - expectations for the course of the disease - your opinion or preference

Treatment might contain: - routine ultrasound procedures - to monitor the dimension and level of development of the aneurysm - controlling or changing risk aspects - actions such as quitting smoking cigarettes, handling blood sugars if diabetic, losing bodyweight if overweight or obese, and controlling diet fat intake may help to control the progression of the aneurysm - medication - to handle variables such as hyperlipidemia (raised levels of fats in the blood) and/or high blood pressure - surgery

Asymptomatic aneurysms may not demand surgery intervention until they achieve a certain dimension or are noted to be improving in size over a certain period of time. Guidelines considered when producing surgery options contain, but are not limited to, the following: - aneurysm size greater than 5 centimeters (about two inches) - aneurysm growth rate 0.5 centimeters (slightly less than one-fourth inch) over a period of six months to one year - patient's ability to tolerate the procedure

For symptomatic aneurysms, quick intervention is advised.

Know more about abdominal aortic aneurysm and abdominal aortic aneurysm open repair

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